<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>水墨登录</title>
    <style>
        @import url('https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&display=swap');
        
        body {
            margin: 0;
            height: 100vh;
            background: #f5f5f5 url('https://images.unsplash.com/photo-1518640467707-6811f4a6ab73?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80') no-repeat center/cover;
            font-family: 'Ma Shan Zheng', cursive;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .ink-container {
            width: 400px;
            padding: 40px;
            background: rgba(255, 255, 255, 0.85);
            border-radius: 5px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        .ink-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0,0,0,0.1) 0%, transparent 70%);
            z-index: -1;
        }
        
        h2 {
            color: #333;
            text-align: center;
            margin-bottom: 40px;
            font-size: 32px;
            letter-spacing: 5px;
            position: relative;
        }
        
        h2::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 2px;
            background: linear-gradient(to right, transparent, #333, transparent);
        }
        
        .ink-input {
            position: relative;
            margin-bottom: 30px;
        }
        
        input {
            width: 100%;
            padding: 15px 0;
            background: transparent;
            border: none;
            border-bottom: 1px solid #999;
            color: #333;
            font-size: 16px;
            font-family: 'Ma Shan Zheng', cursive;
            letter-spacing: 1px;
        }
        
        input:focus {
            outline: none;
            border-bottom-color: #000;
        }
        
        .ink-label {
            position: absolute;
            left: 0;
            top: 15px;
            color: #666;
            transition: all 0.3s;
            pointer-events: none;
        }
        
        input:focus ~ .ink-label,
        input:valid ~ .ink-label {
            top: -15px;
            font-size: 14px;
            color: #000;
        }
        
        .ink-btn {
            width: 100%;
            padding: 15px;
            background: #333;
            border: none;
            border-radius: 3px;
            color: white;
            font-size: 18px;
            font-family: 'Ma Shan Zheng', cursive;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        
        .ink-btn::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 5px;
            height: 5px;
            background: rgba(255, 255, 255, 0.5);
            opacity: 0;
            border-radius: 100%;
            transform: scale(1, 1) translate(-50%, -50%);
            transform-origin: 50% 50%;
        }
        
        .ink-btn:focus:not(:active)::after {
            animation: ripple 1s ease-out;
        }
        
        @keyframes ripple {
            0% {
                transform: scale(0, 0);
                opacity: 0.5;
            }
            100% {
                transform: scale(20, 20);
                opacity: 0;
            }
        }
        
        .ink-btn:hover {
            background: #000;
        }
        
        .ink-decoration {
            position: absolute;
            width: 100px;
            height: 100px;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><path fill="none" stroke="black" stroke-width="0.5" d="M20,20 Q50,10 80,20 T80,80 Q50,90 20,80 T20,20" opacity="0.1"/></svg>') no-repeat;
            opacity: 0.1;
        }
        
        .decoration-1 {
            top: 20px;
            right: 20px;
        }
        
        .decoration-2 {
            bottom: 20px;
            left: 20px;
            transform: rotate(180deg);
        }
    </style>
</head>
<body>
    <div class="ink-container">
        <div class="ink-decoration decoration-1"></div>
        <div class="ink-decoration decoration-2"></div>
        <h2>登 录</h2>
        <div class="ink-input">
            <input type="text" id="ink-user" required>
            <span class="ink-label">用户名</span>
        </div>
        <div class="ink-input">
            <input type="password" id="ink-pass" required>
            <span class="ink-label">密码</span>
        </div>
        <button class="ink-btn">登 录</button>
    </div>
</body>
</html>